a bird flies 10 m/s east for 2 seconds, then 10 m/s north for 1 second,whats the avg. velocity? Is all you do add the vectors? The x component would be 20 and y be 10? and get around 22? A car's velocity changes from 13.9 m/s east to 12.8 m/s northeast. What is the change in it's velocity?